PSI - Issue 79

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 79 (2026) 176–181

© 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of IGF28 - MedFract3 organizers Keywords: weldability; superalloy; laser welding; additive manufacturing Abstract The weldability of Inconel 625 produced by Laser Powder Bed Fusion (L-PBF) is evaluated. The evaluation is based on the metallurgical characterization of a bead-on-plate weld made by the Laser Beam Welding (LBW) process. The characterization included optical and electron microscopy, and the EDS and EBSD techniques were employed to analyse the chemical composition and the microstructure of the bead. The results reported in the present work confirmed that the fusion zone is well penetrated, and it is not possible to detect any significant welding defect, such as cracks or porosity. Laser Beam Welding is thus deemed a promising technique to weld Ni-based superalloys obtained through additive manufacturing. 1. Introduction The weldability of nickel-based superalloys poses a serious issue for the maintenance and durability of critical components such as gas turbines and aeroengines, usually fabricated with this category of alloys. In the case of damage, several repairing strategies based on laser welding can be employed to refurbish the components and 28th International Conference on Fracture and Structural Integrity - 3rd Mediterranean Conference on Fracture and Structural Integrity Investigation On The Microstructure Of Laser Beam Welded IN625 Produced Via Additive Manufacturing Saveria Spiller a * , Alessandra Varone b , Fabio Bergamini c , Giuliano Angella d , Paolo Ferro a a University of Padova, Department of Management and Engineering, Stradella San Nicola 3 36100, Vicenza, Italy b University of Rome Tor Vergata, Department of Industrial Engineering, Via del Politecnico 1 00133, Rome, Italy c ENEA, Department for Sustainability-Research Centre of Casaccia, Santa Maria di Galeria, 00123 Rome, Italy d National Research Council of Italy (CNR), Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), 20125 Milan, Italy.

* Corresponding author. E-mail address: saveria.spiller@unipd.it

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of IGF28 - MedFract3 organizers 10.1016/j.prostr.2025.12.322